enhance this existing downtown streetscape animation with subtle winter atmosphere and festive human activity while preserving all existing buildings materials plants lighting proportions and camera motion exactly as shown add a small number of realistic people walking casually on sidewalks and entering shops dressed in winter clothing coats scarves hats carrying shopping bags add light slow falling snowflakes that do not obscure visibility or details of the architecture add warm subtle holiday ambiance soft window glow tasteful string lights on storefronts or light poles maintain photorealistic lighting scale and realism do not change the architecture landscaping street layout paving patterns signage or camera path keep the scene grounded natural and believable no fantasy elements no exaggerated snow accumulation
